The Earth's magnetic field is approximately 5 × 10-5 T. If the field produced by the current in a long straight wire 1.1 mm from the wire is equalto the Earth's field, what is the current in the wire?A

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Answered: The Earth's magnetic field is…

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

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Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 80AP: The current density in the long, cylindrical wire shown in the accompanying figure varies with...

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An electron moving with a velocity v=(4.0i+3.0j+2.0k)106m/s enters a region where there is a uniform electric field and a uniform magnetic field. The magnetic field is given by v=(1.0i2.0j+4.0k)102T. If the electron travels through a region without being deflected, what is the electric field?
A 0.50-kg copper sheet drops through a uniform horizontal magnetic field of 1.5 T, and it reaches a terminal velocity of 2.0 m's. (a) What is the net map,-, eh: force on the sheet after it reaches terminal velocity? (b) Describe the mechanism responsible for this force, (c) How much power is dissipated as Joule heating while the sheet moves at terminal velocity?
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(a) A 0.750-m-long section of cable carrying current to a car starter motor makes an angle at 60° with the Earth’s 5.00105-T field. What is the current when the wire experiences a force of 7.00103N ? (b) If you run the wire between the poles of a strong horseshoe magnet, subjecting 5.00 cm of it to a 1.75T field, what force is exerted on this segment of wire?
A steady current I flows through a wire of radius a. The current density in a wire varies with r as J = kr2, where k is a constant and r is the distance from the axis of the wire. Find expressions for the magnitudes of the magnetic field inside and outside the wire as a function of r. (Hint: Find the current through an Amprian loop of radius r using Ithru=JdA.)
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A superconducting wire of diameter 0.25 cm carries a current of 1000 A. What is the magnetic field just outside the wire?
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The Earth's magnetic field is approximately 5 × 10-5 T. If the field produced by the current in a long straight wire 1.1 mm from the wire is equal to the Earth's field, what is the current in the wire? A